Stamping machine



Oct. 16, 1934. w BROOKS 1,977,425 I STAMPING MACHINE Filed Dec. 17, 1931 3 Sheets-Sheet l i INVENTOR D Wiggkmz EB; 'oo/w his ATTORNEY @fiita 1% 1934. w BROOKS 1,977,425

' STAMPING MACHINE Filed Dec. 17 1931 5 Sheets-Sheet 2 INVENTOR William H. Braoks his ATTORNEY Oct. 16, 1934. w H, BROOKS 1,977,425

STAMPING MACHINE Filed Dec. 17, 1931 5 Sheets-Sheet 5 In INVENTOR i William H Brooks BY 6-8 fix his ATTORNEY Patented Oct. l6,

UNITED STATES ismz-s 7 STAMPENG MACHINE William H. Breaks, Oconomowoc, Wis, assignor 'to Carnation Company, Milwaukee, Wis, a corporation of Delaware Application December '17, 1921, Serial No. 581,653

6 Claims. (01. 101-4 1) This invention relates to stamping machines, and particularly to a machine for stamping or applying certain informative indicia to containers, such for instance, as the date when a commodity is sealed in a can or other storage vessel.

It is a general object and purpose of the present invention to provide a machine of this character embodying certain important improvements in the stamping machine disclosed in Patent No.

' 1,759,973 granted to my assignee on May 27, 1930,

whereby the machine may be operated at higher speeds while at the same time much more clearly delineated impressions are obtained.

It is a more particular object of the invention to 115. provide a stamping machine embodying relatively few parts in its construction, so arranged and associated as to enable the machine to be efficiently operated with substantial absence of lost motion between the relatively movable parts.

It is another object of the invention to provide means whereby the transmission of violent shocks or jars to the machine parts in starting or stopping the operation thereof will be substantially eliminated, and to also compensate for misadjustments. Thereby the application of the power force and inertia of the moving parts to an article being stamped is obviated, thus avoiding damage to the parts of the machine.

It is an additional object of my invention to provide an improved mounting of thety-pe holder, so that it is sensitively responsive to variation in dimensions of the cans orother articles upon contact of the type therewith, and thus minimize wear of the parts.

More particularly in accomplishing the above purposes, in a practical embodiment of the invention, I provide a carrier for the type holder which is slidably and pivotally movable with respect to'the stationary part on the machine frame, together with mechanism for moving said carrier from the type inking position to the stamp-. ing position, and which movement is controlled by means of a spring capable of readily yielding to any obstruction in the path of the typeholder. It is also an objectof my invention to provide in another embodiment thereof, a pair of the carriers and type holders with individual inking pads and a common operatingmeansfor said carriers, whereby said carriers are alternately moved fromthe type inking position to the stamping position. Thus in a relatively simple arrangement, the capacity of the machine may be greatly increased' With the above and other objects in view, the

1.55 invention consists in the improved stamping machine and in the form, construction and relative arrangement or" itsseveral parts as will be hereinafter more fully described, illustrated in the accompanying drawings, and subsequently incorporated in the subjoined claims.

In the drawings wherein I have disclosed several simple and practical embodiments of my invention, and in which similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a front elevation of a single unit stamping machine constructed in accordance with one embodiment of the invention;

Fig. 2 is a side elevation thereof, certain parts being shown in section'as indicated by the line 2 2 in Fig. 1; Fig. 3 is a'hoiizontal sectional view on an enlarged scale taken substantially on the 1ine-3-3 of Fig. 1;

4 is a similar enlarged horizontal sectional view taken on the line 4'--4 of Fig. 1; and

Fig. 5 is a front elevation of a multiple unit machine embodying my presentimprovements.

Referring in detail to the drawings, as shown in Fig. 1, upon a suitable part5 of the frame of a can filling or soldering machine, I secure one arm of the bracket member 6. To the other -ver-' tically disposed arm of this bracket member, a supporting casting for the primary parts of the mechanism, is rigidly bolted or otherwise secured at its lower end, as indicated at-7. This casting includes an upwardly extending obliquely angled standard 8. Adjacent to its lower end and projecting from one side thereof, this standard 7 is formed with an elongated bearing sleeve or hub 9. Below this bearing sleeve, the standard is formed with a laterally extending upwardly inclined arm 10 for a purpose which will later be explained. A

The standard 8 at its upper end is also formed with a horizontally projecting hub or boss 11 extending from the opposite side of the standard with respect to the sleeve '9, and in thisbossthe rod or pin 12 is securely fixed, said pin projecting beyond the end of the boss and pivotally'supporting the rectangular member or block 13. This block is loosely fitted in the longitudinal slot 15 of the carrier bar 14 for the type holder to be presently referred to, and is provided on one end with flanges 16 extending upon the side face of the bar 14. The block 13 is retained in assembled relation with respect to the bar 14 and upon the projecting end of pin 12 by means of the cotter pin 17, or other suitable device. Thus, it will be understood that the carrier bar 14 has, 110

: the bearing sleeve 9.

, presently become evident.

a free sliding and pivotal movement with respect to the upper end of the fixed standard 8.

The bar 14 at its lower end on one side thereof is formed with the vertically spaced apertured guide lugs 18 in which the spindle 19 is axially movable. The lower end of this spindle is formed with a horizontal bifurcated head 20. The lower arm of this head is loosely received inthe rectangular boss 22 centrally formed upon the type holder 21. As herein shown, this type holder is of arcuate form in plan and provided with suitable means to receive and retain the type elements indicated at 23.

An angular plate 24 engaged upon the lower lug 18 has its horizontal arln suitably fixed to the spindle 19 for vertical movement therewith. The lower end of a spring 25 surrounding, said spindle bears on this plate, while its upper end bears against the upper lug 18, said spring thus acting to yieldingly urge the spindle and the type holder 21 downwardly to a normal position.

The spindle 19 has an axially extending bore therethrough to slidably receive the rod 26, the lower end of which is provided with an enlarged head 27 received in the enlarged lower end of said bore, as indicated at 28. lI'he coil spring 29 within this lower end of. the bore surrounds the rod 26 and bearing against head 27 yieldingly urges the rod downwardly through the spindle 19. To the upper end of rod 26 above the spindle 19, a stop collar 30 of any suitable form is attached. n The lower end of the part 27 is preferably of semi-spherical form and has bearing engagement upon a concave seat or depression 31 formed in the upper, surface of the boss 22 on the type holder 21. It will be noted that the downward pressure thus exerted upon the type holder is substantially in vertical alignment with the type elements, thus rendering the responsive action of the spring 29 to pressure contact against the type elements very sensitive, whereby wear, due to excessive friction, will be reduced to a minimum. Upon the axis 32 suitably fixed at its lower end in the arm 10} an ink pad receiving cup 33 is rotatably mounted, said cup having suitably attached to the underside thereof a ratchet disc 34. Between this ratchet disc and the upper surface of arm 19, the horizontal arm of a lever 35 is loosely engaged upon the bolt or axis 32, the vertical arm 36 of this lever extending upwardly at one side of the cup 33. The inkingpad 3'7 contained in this cup may consist of sponge rubber or felt or other suitable absorbent material. Upon the arm 16, a leaf spring 38 is suitably mounted, engaging at its free end with the teeth of the ratchet 34 to prevent rotative movement of the ink pad cup 33 in one direction. The spring pressed pawl 39 pivoted on the lever 35 as at 40 coacts at its free end with the teeth of the ratchet 34, so that in the movement of said lever in the other direction, the inking pad will be rotated.

For the purpose of actuating the carrier bar 14, I have herein shown a shaft 41 mounted in Preferably an eccentric bushing 42 is interposedbetween the shaft and the wall of the bearing and fixed in adjusted position in relation to the latter by a suitable set screw 43. The purpose of this bushing will To one end of the shaft 41, a gear segment 44 is rigidly attached. by any approved means, said gear segment being in constant meshing engagement with the teeth of the pinion 45 fixed to one end of the shaft 46 journalled in the bearing hub 47 formed upon the standard 8 above the bearing sleeve 9. This pinion is provided with a radially extending arm 48, the end of which is pivotally attached as at 49 to the lower end of the carrier bar 14.

To the other end of the shaft 41, an arm 50 is rigidly attached at one of its ends, said arm having the slot 51 to slidably receive the stud bolt 52 carried by the member 53 which is adjustably connected with one end of a rod 54. The other end of this'rod is adjustably connected to a similar member 55 pivotally attached to one end of the lever 56. The other end of this lever is pivoted as at 57' to the lower end of a hanger bar 58 suitably fixed at its upper end to part of the machine frame. This lever intermediate of its ends carries an anti-friction roller 59 engaged by the periphery of an eccentric 60 fixed upon a shaft 61 suitably journalled in the machine frame. The eccentric 66 is provided in the periphery thereof nearest to the shaft 61 with a notch or recess 62 to receive the roller 59. The lever 56 is yieldingly urged upwardly from its pivot 57 to maintain contact betweenroller 59 and the eccentric 60 by means of the contractile spring 63. For the purpose of nullifying the action of this spring, and preventing operation of lever 56 by the eccentric 60, 1 provide the dog 64 pivoted at one end on the machine frame as at 65 which may be disposed in a vertical position with its free end in contact with the upper edge of lever 56, as indicated in dotted lines in Fig. 1 of the drawings.

One end of a wire link 66 is loosely pivoted at one of its ends upon a stud 67 fixed in the gear segment 44 above the shaft 41. The other end of this link is provided with a. hook 66 loosely engaged through an aperture in the upper end of arm 36 of the lever carrying the ratchet operating pawl 39. r 1

At a point suitably spaced from the shaft 41 and on the opposite side thereof with respect to the rotatable inking pad, a support as indicated by the broken lines at 68 is arranged to receive the can or container 0 upon which the informative indicia is to be stamped.

Having thus described the mechanical embodiment of my present improvements, the operation thereof may be explained as follows:

Assuming that a container has been placed upon the support 68 and that the type holder 21 is in position upon the inking pad-as shown in full lines in Fig.1 of the drawings, upon rotation of the eccentric 60 from the illustrated position, it will be evident that the spring 63 by its contractiie action, will pull the free end of the lever 56 upwardly and through the rod connection 54 with the slotted arm 50, the shaft 41 and therefore the gear-segment 44 will be rotated. An anticlockwise rotation is thereby transmitted to the pinion 45, swinging the crank arm 48 thereof upwardly and to the opposite side of the axis of said pinion. In such operation, it is evident that the carrier bar 14 will slide upwardly relative to the pivoted guide block 13 on standard- 8 as the type holder is lifted from theinking pad 37; In the downward movement of the crank arm 48 and when the carrier bar 14 has'assumed a substan-- tially perpendicular .position'as shown in broken lines in Fig. 1, the inked type elements-23 come into contact with the impression receiving surface or" the can or container 0. This action takes place as the roller 59 on lever 56 enters-the recess 62 of eccentric 60, at which time thereis a sudden final contraction of spring 63. This produces a clear and definite impression of the type characters, resistance to the impact force of the type charactersegai ist the can oncontainerbeing cushioned initially by the spring: and subsequently by spring zfi, asthe. spindle 19, moves upwardly relative tothecar-rier bar.l 4.1- ;Any further resistance to .themovement of "the; carrier {bars by crank arm 48, as when cans or containers :of greater heighti are stamped, will be; taken care of, by theispring 63, which is .solely; "efiective in moving the type-carrier to. the. stamping position and will thereforereadily yield in 'the eventjof such: obstructions the continued-"rotation of the eccentric=60.- Thus it will berapparentthat avery effecive means is provided.-.t o compensate for varying can heightamis-adjustments of parts of the mechanism, and excessive wear. Accords ingly,;gpossible, damage orinjury byi the applicae tion of power and inertia of the-moving parts to thejelem'entsof the'jmechanism, is obviated. Also, by proper adjustment of the eccentric bushing 42, wear of the teeth of gear segment 44 and pinion 45 may be taken up to avoid excessive lost motion.

In the movement of the carrier bar and type holder to the stamping position as above explained, the lever is also pivotally moved in a counter-clockwise direction, so that the pawl 39 moves idly over the teeth of the ratchet 34. When in the continued movement of the eccentric 60, the free end of lever 56 is now forced downwardly, the movement of gear segment 44 is reversed, and the carrier bar 14 is returned to the full line position shown in Fig. 1 to again engage the type members 23 with the surface of the inking pad 37. In such movement of the gear segment, link 66 attached thereto imparts a clockwise movemerit to the lever 35, thus causing the pawl 39 the fixed axis 70.

to impart a partial rotation to the cup 33 and the ink pad contained therein. Accordingly, it will be understood that in successive stamping operations, the type members 23 will engage upon different parts of the surface of the ink pad 37, thereby insuring a proper coating of the type faces with ink.

In Fig. 5 of the drawings, I have shown a multiple type machine in which two of the carrier bars 14 are provided, and slidably associated with individual guide blocks 13 in the manner above described, said blocks being pivotally supported upon the common fixed pin 12. Each of these carrier bars 14 is provided at its lower end with a type carrying stamper 21 mounted thereon in the manner heretofore explained.

Ink pad holders 33 are suitably mounted and arranged at opposite sides of the container support 68 and in reverse axially inclined relation thereto. Separate operating pinions and crank arms 48 are connected with the lower ends of the respective carrier bars 14, as previously described. These pinions are rotated in the same direction by a common gear segment 44' journalled upon To this gear segment, one end of the reciprocable rod 71 is pivotally attached as at 72. By certain more or less obvious modifications in the operating connections with the lever 56 referred to in connection with the previously described embodiment of the invention, a reciprocating motion may be imparted to the rod 71. It will be evident from this construction that the stampers are simultaneously actuated, each Stamper stamping the impression upon alternate cans or containers arranged upon the support 68'. In other words, when one stamper is moved from its inking position, to apply the impression to a container surface, the other stamper is simultaneously moved from the impression applying tion, between the spaced inking devices 33. g mFrorn-the foregoingdescription considered in connection with theaccompanying drawings, the

construction-and operation-of the-several illustrated embodiments 'of the; inventionwill .be clearly understood. It will 'begappreciated that inj'both cases, 'the machine consists of comparatively few relatively moving-parts which will functionin :a. reliable and positive manner to clearly and legibly'stamp .the container surface with the desired indicia, and that by reason of the operating means which I provide herein for the carrier and relatively movable type holder, the machine is substantially shockproof, the operation of the clutch to connect and disconnect the eccentric shaft 61 with the source of power having no tendency to damage or injure the parts of the stamper by transmission of severe shock or jar thereto. While I have herein shown and described several desirable practical applications of the essential features of my present improvements, it is nevertheless to be understood that the same may also be embodied in various other alternative structural forms, and I accordingly reserve the privilege of resorting to all such legitimate modifications in the form, construction and relative arrangement of the several elements as may be fairly embodied within the spirit and scope of the invention as claimed.

I claim:

1. In a stamping machine, a standard, a guide pivotally mounted on the upper end thereof, a carrier bar slidably engaged with said guide, a type holder mounted upon one end of said carrier bar, a pinion mounted on the standard and having a crank arm pivotally connected with the latter end of the carrier bar, a gear segment mounted on the standard in mesh with said pinion, and means yieldingly resisting movement of said gear segment in one direction to move said carrier bar and type holder to stamping position.

2. In a stamping machine, a carrier bar mounted at one end for pivotal and sliding movement, a type holder mounted on the other end of said bar, an inking pad, means for actuating the carrier bar to engage the type with the inking pad or with the impression receiving surface, said means comprising a crank pivotally connected with the carrier bar, power operated means operatively connected with the crank to move said bar and the type holder to the inking position, and spring means controlling the actuation of said power operated means to move the carrier bar and type holder to the impression producing position. 7

3. In a stamping machine, a carrier bar mounted for pivotal and sliding movement, a type holder mounted on one end of said bar, an inking pad, means for moving said bar to engage the type with the inking pad or with the impression receiving surface, said means including a crank pivotally connected with said bar, actuating means for said crank, a power driven eccentric cooperating with a part of the actuating means to move said bar and type holder in one direction and engage the type with the inking pad, and spring means controlling the operation of said actuating means independently'of saideccentric to move the said bar and the type holder in the opposite direction and engage the type with the impression receiving surface.

4. Ina stamping machine, spaced inking devices, separate type holders supplied by the respective inking devices, and means for simultaneously actuating said type holders and alternately moving the same from their respective inking positions to an impression applying'position equi distantly-spaced from said inking devices the impression applying position of one type holder-being substantially the same as the impressionapplying position of the other holder.

5. In a stamping machine, spaced'inking devices, a pair of carrier bars mounted for relative pivotal and sliding movement, a type holder carried by each bar separate operating cranks pivotally connected with the respective bars, and a common operating member forsaid cranks to simultaneously actuate the same and alternately move the typeholde'rs thereon from their respective inking positions to impression applying position; a I 1 6. In a stamping machine, spaced inking devices, type holders supplied by-the respective inking devices a' rotary operating member for each type holder and a single actuating member common to both of the operating members to' simultaneously actuate thelatter and alternately move the type holders from their respective inking'positions to an impression applying position intermediate of the typeholders and the impression applying position of each holder'being substantially theisame.

I WILLIAM H.-BROOKS. 

